What is the ratio of mass of a gold atom and an `alpha`-particle ?

Explanation

To find the ratio of the mass of a gold atom to that of an alpha particle, we can follow these steps:

### Step 1: Identify the mass of a gold atom
The mass of a gold atom is given as 197 atomic mass units (amu).

### Step 2: Identify the mass of an alpha particle
The mass of an alpha particle is given as 4 atomic mass units (amu).

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